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QUESTION 1 [48 MARKS 1. Name two types of distillation columns and list their advantages and disadvantages. (10) 2. Between the two columns, when should each be used? (10) 3. List 8 practical steps adopted in designing a distillation column. (8) 4. Consid

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QUESTION 1 [48 MARKS 1. Name two types of distillation columns and list their advantages and disadvantages. (10) 2. Betw... 查看全部

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2 The phase diagram for the Ag/Cu system is shown below. 1100 1000 Liquid 900 N 3 800 Jold 1 700 5 600 500 100 A: Weight Percent cu Ag Cu (a) Identify each numbered area by the phase or phases they represent. (b) A sample 70% Cu (by weight) is liquified a

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2 The phase diagram for the Ag/Cu system is shown below. 1100 1000 Liquid 900 N 3 800 Jold 1 700 5 600 500 100 A: Weight... 查看全部

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For a solid to solid phasetransformation during cooling, draw schematically the nucleationrate as a function of temperature. Explain the physicalreason for the temperature dependence of the nucleation rate. Will a similar temperature dependence occur in

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For a solid to solid phasetransformation during cooling, draw schematically the nucleationrate as a function of temperat... 查看全部

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3 3 The AwSi phase diagram is shown below. This sys- tem has importance in the semiconductor industry wherever Au contacts are deposited on Si circuit sub- strates. (a) Identify the phase or phases associated with each area of the diagram. (6) What would

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3 3 The AwSi phase diagram is shown below. This sys- tem has importance in the semiconductor industry wherever Au contac... 查看全部

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Moving to the next question prevents changes to this Question 11 In closed system of non-conservative pollutant with a half-life equal to 693 days, if the initial concentration of the polluant 5 me, me te concent the pollutant after 5 days? O 0.4 mg/liter

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Moving to the next question prevents changes to this Question 11 In closed system of non-conservative pollutant with a h... 查看全部

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Q 1: 1000 kg of C,He is burned in a furnace with 20,000 kg of air. (a) Calculate the composition of flue gas (including N, and unreacted 02) [7 marks] (b) How much excess air has been calculated? [7 marks] (c) If Co, is captured and removed, determine the

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Q 1: 1000 kg of C,He is burned in a furnace with 20,000 kg of air. (a) Calculate the composition of flue gas (including ... 查看全部

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Derive an equation to estimate the mole fraction of the constituent (i) in the three phases (i.e. xi, yi, zi).

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Derive an equation to estimate the mole fraction of the constituent (i) in the three phases (i.e. xi, yi, zi).

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2. A feed solution of 4000 kg/hr at 45°C containing Na2CO3 is cooled to 30°C to produce sodium car- bonate monohydrate crystals. The average heat capacity of the feed can be assumed 2.93 kJ/kg-K. How many units of Swenson-Walker crystallizer will be neede

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2. A feed solution of 4000 kg/hr at 45°C containing Na2CO3 is cooled to 30°C to produce sodium car- bonate monohydrate c... 查看全部

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4. The 35°C water shown below discharges to sea-level standard atmosphere. Sudden drops in pressure can sometimes lead to cavitation, which causes bubble formation when the pressure equals the vapor pressure of a fluid at a given temperature. At 35°C the

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4. The 35°C water shown below discharges to sea-level standard atmosphere. Sudden drops in pressure can sometimes lead t... 查看全部

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1. A feed solution of 4000 kg/hr at 45°C containing Na2CO3 is cooled to 30°C to produce sodium car- bonate monohydrate crystals. The average heat capacity of the feed can be assumed 2.93 kJ/kg-K. Calculate the yield of crystals, kg/hr.

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1. A feed solution of 4000 kg/hr at 45°C containing Na2CO3 is cooled to 30°C to produce sodium car- bonate monohydrate c... 查看全部

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